Supplementary carburetor for starting internal-combustion engines



C. G. PULLIN. SUPPLEMENTARY CARBURETOR FOR STARTING INTERNAL COMBUSTIONENGINES.

APPLICATION FILED JUNE 9, I9I9.

Patented Aug. 1,1922.

Attorney-s GYB-IL GEORGE PULL-IN, OF LONDON, EEG-LAND.

surrnn unngran cAnBUnEroR iron STARTING INTERNAL-COMBUSTION nnernns.

Specification of Letters Patent Patented Aug. 1, 1922.

Application filed June 9, 1919. Serial No. 302,916.

(@RANTED UNDER THE PROVISIONS ACT 01? MllBGl-IG, 1921, i1 STAT. I4.1313.)

new and useful Improvements in Supple mentary Carburetors for StartingInternaliGoinbustion Engines for which I have filed an application inEngland, June 7, 1918, PatentNo. 156,272, dated January 13, 1921), .ofwhich the following is .a specification.

This invention relates to improuementsin supplementary carburetors forstarting nternal combustion engines, more particularly to carburetors inwhlch the prlmary charge of petrol or other motive agent is caused .topass to the induction pipe or intake manifold of the engine through acarbursting chamber, or tube or through a tube 1 or receptaclecontaining cotton wick, cotton waste or other surface vaporizingmaterial, and has for ts obgect to ensure a reliable supply of petrol orother fuel to the carburetor as required and to. provide simple andeffective means of control for regulating the supplyof mixture or fueland air there from to the induction pipe.

According to this invention the admission of thestarting mixture of fueland air to the induction pipe is controlled by a valve which alsocontrols directly or indirectly the admission .of the fuel to thecarburetor, or vaporizer. The invention also includes means whereby thefuel supply to the-caribureting or vaporizing chamber is regulated andmaintained constant.

The invention is hereinafter described with reference to theaccompanying drawings in which similar parts are indicated by the samereference characters throughout the different figures.

Figure 1 is asectional elevation of a supplementarycarburetor or starterconstructed according to this invention.

Figure 2 is an elevation of the same viewed at right angles to the planeof section of Fig. 1.

Figure 3 is a horizontal section through the valve casing with the plugor valve removed.

Figs. 4 and 5 are transverse sections taken through different parts ofthe plug to illustrate passages therein As shown in Figures 1 to 5 avaporizer 9,1 nipple c for screwing into the induction pipe, withanother nipple 0 for the attachment of the fuel supply pipe, to whichfuel 1S fed by gravity or pressure, and with a further nipple from whicha ipe, 19 is led to a hollow plug h; at thetop of the vaporizer tube a.Asshown pipe 9 is attached to the plug it and to the nipple 0 by unions1 g and g Plug his fitted {with a needle valve 2' and communicates withthe vaporizer tube a through an inlet orifice h regulated or adjusted bythe needle valve i. A cap a fixed to the top of the vaporizer tube a isformed with a centraleircular recess a into which the hollow plug it,carrying the needle valve, is screwed, the bottom ofthe recess beingperforated or provided with a passage as shown toaa'd nit the fuel tothe vaporizer tube a.

,Aroundthe top of the vaporizer tube, apertures (L3 are made for theadmission. of air, such apertures being suitably protected against theingress of water and grit by a depending flange or cowl (i provided forthat purposeon the cap a. A fuel passage 03" is formed in the plugvalved between fuel passages y, j in the body sand is adapted to put thenipple c and the .fuel supply pipe connected therewith ,in communicationwjth thenipple c and pipe 51, whilst a compound passage (Z (Z isformedin the plug between mixture or vapour passages in la in the body afor p t ingapor r ubes i c mm nication with the induction pipe throughthe nipple c. A gauze covered extra air inlet 0 is also controlled bythe compound passage d (Z by which it can be put in communication withthe induction pipe through the passage 70 after the mixture has been outoff.

In operation the plug valve (Z is turned from the closed position tofirst put the fuel supply pipe in communication with the pipe 9 leadingto the top of vaporizer tube from whence the fuel passes under thecontrol of the needle valve 2' into the wick or other material in thetube a. i

A further movement of the plug valve opens the passages 70 and k foradmitting mixture to the induction pipe and the final movement of theplug valve cuts off the fuel passage and the mixture passage andleavesonly the air inlet 0 open to the induction pipe, for the supply ofextra'air if required.

The air from the inlet 0 passes to the induction pipe through thedelivery passage is which previously delivered mixture or vapour to theinduction pipe.

I claim:

1. A supplementary carburetor or starter for internal combustionengines, comprising a valve having a' body attachable directly to theintake manifold of an engine and a plug member rotatable in the body,and a carburcting or vaporizing chamber mountedon the body of saidvalve, sail vaporizing chamber being provided with a fuelsupply passageand a mixture outlet passage, the rotatable plug of the valve beingprovidedwith means operable by rotary movement of its plug to open andclose C both the fuel supply passage and the mixture outlet passage.

2. The structure recited in claim 1, said vaporizing chamber having 1 anair inlet therein, said'valve having an air inlet therein, the lastmentioned air inlet being operable by the plug of the valve by turningsaid plug to a position for closing the fuel supplypassage and the fluidmixture outlet.

3.-The structure recited in claim 1, the carburetor being provided witha cap on its top, said cap having therein a fuel inlet,

and a needle valve mounted to operate in said fuel inlet and co-acttherewith to regu-' late the flow of fuel into the vaporizing chamber. a

4. In a supplementary carburetor or starter for internalcombustionengines, the

" combination of a valve casing attachable to the intake manifold of anengine, a carbureting or vaporizing chamber mounted on said valve casingand provided with an air inlet and a vapor outlet, absorbent ma terialin said vaporizing chamber between said air inlet and vapor outlet, saidvaporizingchamber being provided with a pass age to conduct liquid fuelto said absorbent material, and a valve in position to coact with thevalve casing for controlling the flow of vapor through said vaporoutlet,

-means also being provided for controlling age that delivers vapor tothe inductionpipe, said valve casing also having therein an air inlet,said valve being operable to selectively establish communication betweensaid vapor passage and delivery passage and between the last said airinlet passageand delivery passage. 1

6. In a supplementary carburetor or starter for internal combustionengines, the combination of a main valve casing attachable to the intakemanifold of an engine, a

carbureting or vaporizing chamber mounted in said'valve casing andprovided with air inlets near its top, said chamber being provided witha cover including a central depending cavity or liquid fuel receptacle,said 1 receptacle having passages in position to direct liquid fueloutward into currents of air from said air inlets, a needle valve casingsecured to said cover and having its outlet in communication with saidliquid fuel receptacle, a needle valve in the needle valve casing tocontrol the flow of liquid fuel into said receptacle, a main controllingvalve in the main valve casing, and means to conduct liquid fuel fromsaid main valve' casing to said needle valve casing, said main valvebeing operable in the main valve casing to control the flow of liquidfuel into said needle valve casing and also to control the flow of vaporfrom said vaporizing chamber; a

In testimony whereof he has afiixedhis signature. I

OYRIL GEORGE PUILIN.

